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Spokane Valley, Washington climate
Csb Warm-summer Mediterranean
Spokane Valley has a seasonal cool-temperate climate (Warm-summer Mediterranean, Köppen Csb). The hottest month is July with an average daily high near 87°F, while the coldest is December averaging around 26°F at night. Precipitation totals about 17 inches a year and is strongly seasonal — December alone averages 2.2 inches while August barely receives 0.54 inches.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresClear vs cloudy days
Share of days each month that are clear, partly cloudy or cloudy · 1991–2020 · hover a month for the day countsSpokane Valley climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 38 | 43 | 51 | 60 | 70 | 76 | 87 | 86 | 76 | 60 | 45 | 37 |
| Avg temp (°F) | 32 | 35 | 42 | 48 | 57 | 63 | 72 | 70 | 61 | 49 | 38 | 31 |
| Avg low (°F) | 26 | 27 | 32 | 37 | 44 | 50 | 56 | 55 | 47 | 38 | 31 | 26 |
| Precipitation (in) | 2.0 | 1.3 | 1.8 | 1.5 | 1.7 | 1.5 | 0.7 | 0.5 | 0.7 | 1.5 | 2.0 | 2.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 38 | 43 | 51 | 60 | 70 | 76 |
| Avg temp (°F) | 32 | 35 | 42 | 48 | 57 | 63 |
| Avg low (°F) | 26 | 27 | 32 | 37 | 44 | 50 |
| Precipitation (in) | 2.0 | 1.3 | 1.8 | 1.5 | 1.7 | 1.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 87 | 86 | 76 | 60 | 45 | 37 |
| Avg temp (°F) | 72 | 70 | 61 | 49 | 38 | 31 |
| Avg low (°F) | 56 | 55 | 47 | 38 | 31 | 26 |
| Precipitation (in) | 0.7 | 0.5 | 0.7 | 1.5 | 2.0 | 2.2 |
How often — frequency of weather events
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 11 | 13 | 10 | 10 | 9 | 3 | 3 | 5 | 10 | 14 | 14 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.5 | 2 | 13 | 10 | 2 | — | — | — |
| Days with low ≤ 32°F (days) | 23 | 21 | 17 | 7 | 1 | — | — | — | 0.2 | 8 | 17 | 25 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 14 | 11 | 13 | 10 | 10 | 9 |
| Days with high ≥ 90°F (days) | — | — | — | — | 0.5 | 2 |
| Days with low ≤ 32°F (days) | 23 | 21 | 17 | 7 | 1 | — |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Days with measurable rain (days) | 3 | 3 | 5 | 10 | 14 | 14 |
| Days with high ≥ 90°F (days) | 13 | 10 | 2 | — | — | — |
| Days with low ≤ 32°F (days) | — | — | 0.2 | 8 | 17 | 25 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 70 | 71 | 69 | 64 | 60 | 38 | 40 | 48 | 62 | 74 | 75 |
| Clear days (≤ 30% cloud) | 2 | 4 | 3 | 3 | 6 | 6 | 15 | 14 | 12 | 6 | 3 | 2 |
| Partly cloudy days (30–70%) | 8 | 7 | 8 | 10 | 9 | 11 | 10 | 11 | 8 | 9 | 7 | 8 |
| Cloudy days (≥ 70%) | 21 | 17 | 19 | 17 | 16 | 13 | 6 | 6 | 10 | 16 | 20 | 21 |
| Relative humidity (%) | 94 | 86 | 78 | 70 | 64 | 61 | 52 | 50 | 54 | 68 | 84 | 92 |
| Wind speed (mph) | 4.6 | 4.8 | 5.1 | 4.9 | 4.6 | 4.5 | 4.2 | 4.0 | 4.0 | 4.4 | 4.6 | 4.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 70 | 71 | 69 | 64 | 60 |
| Clear days (≤ 30% cloud) | 2 | 4 | 3 | 3 | 6 | 6 |
| Partly cloudy days (30–70%) | 8 | 7 | 8 | 10 | 9 | 11 |
| Cloudy days (≥ 70%) | 21 | 17 | 19 | 17 | 16 | 13 |
| Relative humidity (%) | 94 | 86 | 78 | 70 | 64 | 61 |
| Wind speed (mph) | 4.6 | 4.8 | 5.1 | 4.9 | 4.6 | 4.5 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 38 | 40 | 48 | 62 | 74 | 75 |
| Clear days (≤ 30% cloud) | 15 | 14 | 12 | 6 | 3 | 2 |
| Partly cloudy days (30–70%) | 10 | 11 | 8 | 9 | 7 | 8 |
| Cloudy days (≥ 70%) | 6 | 6 | 10 | 16 | 20 | 21 |
| Relative humidity (%) | 52 | 50 | 54 | 68 | 84 | 92 |
| Wind speed (mph) | 4.2 | 4.0 | 4.0 | 4.4 | 4.6 | 4.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Spokane Felts Fld (NOAA GHCN station USW00094176), about 6 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.